# Calcium Chloride (CaCl2) Molecular Weight Calculation

The molecular weight of Calcium Chloride (CaCl2) is 110.9834.

Calcium chloride [CaCl2] (CAS Registry Number: 10043-52-4) is an inorganic compound of two elements: Calcium (Ca) and Chlorine (Cl). The molecular weight of Calcium chloride is 110.9854 which can be calculated by adding up the total weight (atomic weight multiplied by their number) of all its elements.

# CALCULATION PROCEDURE: Calcium Chloride (CaCl2) Molecular Weight Calculation

Step 1: Find out the chemical formula and determine constituent atoms and their number in a Calcium Chloride molecule.
You will know different atoms and their number in a Calcium chloride molecule from the chemical formula. The chemical formula of Calcium chloride is CaCl2. From the chemical formula, you can find that one molecule of Calcium chloride consists of one Calcium (Ca) atom and two Chlorine (Cl) atoms.

Step 2: Find out the atomic weights of each atom (from the periodic table).

Atomic weight of Calcium (Ca): 40.078 (Ref: Ciaaw-calcium, Jlab-ele020)
Atomic
weight of Chlorine (Cl): 35.4527 (Ref: Jlab-ele017)

Step 3: Calculate the molecular weight of Calcium chloride by adding the total weight of all atoms.

Number of Calcium atoms in Calcium chloride: 1
Atomic weight of Calcium: 40.078
Total weight of Calcium atoms in Calcium chloride: 40.078 x 1 = 40.078

Number of Chlorine atoms in Calcium chloride: 2
Atomic weight of Chlorine: 35.4527
Total weight of Chlorine atoms in Calcium chloride: 35.4527 x 2 = 70.9054

Step 4: Calculate the molecular weight of Calcium chloride by adding up the total weight of all atoms.

Molecular weight of Calcium chloride (CaCl2): 40.078 (Calcium) + 70.9054 (Chlorine) = 110.9834

So the molecular weight of Calcium chloride is 110.9854.

## REFERENCES:

• Ciaaw-calcium: https://www.ciaaw.org/calcium.htm
• Jlab-ele020: https://education.jlab.org/itselemental/ele020.html
• jlab-ele017: https://education.jlab.org/itselemental/ele017.html
• cas.org: https://commonchemistry.cas.org/detail?cas_rn=10043-52-4

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